target_sources(WarpX
  PRIVATE
    CellCenterFunctor.cpp
    DivBFunctor.cpp
    DivEFunctor.cpp
    RhoFunctor.cpp
    PartPerCellFunctor.cpp
    PartPerGridFunctor.cpp
    BackTransformFunctor.cpp
    BackTransformParticleFunctor.cpp
    ParticleReductionFunctor.cpp
)
